Patents by Inventor Robert C. Constable

Robert C. Constable has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Nylon modifiers having enhanced flow properties
    Patent number: 6235840
    Abstract: An impact modifier for thermoplastic polyamides comprises: (A) an elastomeric olefin copolymer; and (B) a resinous olefin homopolymer or copolymer wherein at least one of (A) and (B) is maleated; and wherein the melt flow index of the resulting composition measured at 230° C. and 2.16 kg weight is at least 3 g per 10 minutes.
    Type: Grant
    Filed: March 22, 2000
    Date of Patent: May 22, 2001
    Assignee: Uniroyal Chemical Company, Inc.
    Inventors: Seshan Thiruvengada, Robert C. Constable
  • Nylon modifiers hauling enhanced flow properties
    Patent number: 6077906
    Abstract: An impact modifier for thermoplastic polyamides comprises:(A) an elastomeric olefin copolymer; and(B) a resinous olefin homopolymer or copolymerwherein at least one of (A) and (B) is maleated; andwherein the melt flow index of the resulting composition measured at 230.degree. C. and 2.16 kg weight is at least 3 g per 10 minutes.
    Type: Grant
    Filed: March 11, 1998
    Date of Patent: June 20, 2000
    Inventors: Seshan Thiruvengada, Robert C. Constable
  • Adhesive thermoplastic elastomer blends
    Patent number: 4957968
    Abstract: The present invention relates to an adhesive thermoplastic elastomer composition comprising three major components as follows:(a) at least one polyolefin modified by a chemically reactive functional group such as a carboxylic acid or its derivatives including anhydride, acid chloride, isocyanate, oxazoline, epoxide, amine and hydroxide;(b) at least one other polymer prepared from one or more of the following: ethylene, propylene, butylene, isobutylene, octene-1, 4 methyl pentene-1, hexene-1 or mixtures; and(c) at least one olefinic elastomer, including elastomeric ethylene-propylene copolymers, elastomeric ethylene-propylene terpolymers, polyisoprene, polyisobutylene, ethylene-propylene copoloymer rubber, polybutadiene, natural rubber, elastomeric polyesters, polyurethane elastomers, polyamide elastomers and mixtures.
    Type: Grant
    Filed: August 9, 1988
    Date of Patent: September 18, 1990
    Assignee: Monsanto Company
    Inventors: Ashok M. Adur, Robert C. Constable